The sequence of six 9s which begins at the 762nd decimal place of pi,
(Wells 1986, p. 51). The positions of the first occurrences of strings of 1, 2, ... consecutive 9s are 5, 44, 762, 762, 762, 762, 1722776, 36356642, 564665206, ... (OEIS A048940).
More things to try:
Weisstein, Eric W. "Feynman Point." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/FeynmanPoint.html